HarryA Posted October 2, 2016 Report Share Posted October 2, 2016 Hello from NE PA, A question for you. How to TENS machines generate 40 to 60 volts from say 4.2 volts without using a coil or transformer? Pictured is a TENS circuit that is about 1.26 inches by 1 inch. The battery is on the reverse side of the board. thanks in advance, HarryA Quote Link to comment Share on other sites More sharing options...
audioguru Posted October 3, 2016 Report Share Posted October 3, 2016 Look in Wikipedia for Voltage Multiplier. It has an AC input to capacitors and diodes. Quote Link to comment Share on other sites More sharing options...
steven chiverton Posted March 9, 2022 Report Share Posted March 9, 2022 ive built a simple tens circuit from schematics ive collected online and from there with a simple modifications ive built frequency generators and they sure work good and are great for experiments pictured here is 2 out of a bunch of frequency generators , and if you want higher frequencies a simple frequency doubler dose wonders Quote Link to comment Share on other sites More sharing options...
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